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v115 fails to subscribe Imap subfolders at folder hierarchy-depth > 2; v <=102 works OK

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pgnd
pgnd
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i run tb115/linux, upstream 

 Application Basics

   Name: Thunderbird
   Version: 115.0
   Build ID: 20230711125218
   Distribution ID:

   Update Channel: release
   User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0 Thunderbird/115.0
   OS: Linux 6.3.12-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Jul  6 04:05:18 UTC 2023
   OS Theme: Breeze / Adwaita

   Multiprocess Windows: 0/0
   Fission Windows: 0/0
             Enabled by user
   Remote Processes: 5
   Enterprise Policies: Inactive
   Google Location Service Key: Missing
   Google Safebrowsing Key: Missing
   Mozilla Location Service Key: Missing
   Safe Mode: false
   Memory Size (RAM): 62.6 GB
   Disk Space Available: 168 GB

my IMAP server is a local Dovecot instance

i've a 'deep' MAIL folder hiearchy

myAccount INBOX Sent Junk Trash Drafts folderA subA1 subA11 subA12 subA2 subA11 subA111 subA1111 subA112 subA1121 ...

i do NOT save in TB for Offline -- I keep all @ IMAP

for any TB version <=v102, on account creation/setup, all the folders are seen, and the full (sub)folder hierarchy is dsiplayed & accessible in the client

if I

stop TB cd /home/pgnd/.thunderbird/xA1B2C3y.Dovecot rm -rf ImapMail start TB

the hierarchy is correctly rebuilt, and, as above, all's good.

on upgrade to TB v115, whether I

create a new account

or

stop + delete ImapMail + start

TB only finds/displays to limited depth,

myAccount INBOX Sent Junk Trash Drafts folderA subA1 subA2 ...

NONE of

subA11 subA12 subA11 subA111 subA1111 subA112 subA1121

or their contents are seen/displayed.

i'm unable to get v115 to walk to greater depth

drop back to v102, all's good again.

this is reproducible here, atm, on multiple TB clients, with 2 different Dovecot server instances, and one CyrusMail server instance (@ FastMail)

is there changed config needed in v115 to enable same hierarchy depth capabilities at v<=102?

i run tb115/linux, upstream Application Basics Name: Thunderbird Version: 115.0 Build ID: 20230711125218 Distribution ID: Update Channel: release User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/115.0 Thunderbird/115.0 OS: Linux 6.3.12-200.fc38.x86_64 #1 SMP PREEMPT_DYNAMIC Thu Jul 6 04:05:18 UTC 2023 OS Theme: Breeze / Adwaita Multiprocess Windows: 0/0 Fission Windows: 0/0 Enabled by user Remote Processes: 5 Enterprise Policies: Inactive Google Location Service Key: Missing Google Safebrowsing Key: Missing Mozilla Location Service Key: Missing Safe Mode: false Memory Size (RAM): 62.6 GB Disk Space Available: 168 GB my IMAP server is a local Dovecot instance i've a 'deep' MAIL folder hiearchy myAccount INBOX Sent Junk Trash Drafts folderA subA1 subA11 subA12 subA2 subA11 subA111 subA1111 subA112 subA1121 ... i do NOT save in TB for Offline -- I keep all @ IMAP for any TB version <=v102, on account creation/setup, all the folders are seen, and the full (sub)folder hierarchy is dsiplayed & accessible in the client if I stop TB cd /home/pgnd/.thunderbird/xA1B2C3y.Dovecot rm -rf ImapMail start TB the hierarchy is correctly rebuilt, and, as above, all's good. on upgrade to TB v115, whether I create a new account or stop + delete ImapMail + start TB only finds/displays to limited depth, myAccount INBOX Sent Junk Trash Drafts folderA subA1 subA2 ... NONE of subA11 subA12 subA11 subA111 subA1111 subA112 subA1121 or their contents are seen/displayed. i'm unable to get v115 to walk to greater depth drop back to v102, all's good again. this is reproducible here, atm, on multiple TB clients, with 2 different Dovecot server instances, and one CyrusMail server instance (@ FastMail) is there changed config needed in v115 to enable same hierarchy depth capabilities at v<=102?