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Thunderbird consumed all laptop battery overnight

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Thunderbird 91.5.0 installed on fresh copy of MacOS Monterey has consumed all battery power overnight. Just closing Thunderbird app solved the problem with laptop disconnected at 100% battery in the evening, still showing 100% the following morning.

 Also, I have spotted, that Thunderbird is using at 5% of CPU power when idle (Just displaying message, no emails being pulled - no traffic on eth).
Thunderbird 91.5.0 installed on fresh copy of MacOS Monterey has consumed all battery power overnight. Just closing Thunderbird app solved the problem with laptop disconnected at 100% battery in the evening, still showing 100% the following morning. Also, I have spotted, that Thunderbird is using at 5% of CPU power when idle (Just displaying message, no emails being pulled - no traffic on eth).