This issue only started for me after the 1.19.4 update.
Have no lag using any other features only when I open any inventory devices such as chests main inventory etc.
Lag spikes as I move over items with the cursor. I believe when it loads the item titles it is causes the lag spikes
Thank you for your report!
We're tracking this issue in MCPE-162277, so this ticket is being resolved and linked as a duplicate.
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