Sync is falling way out of spec with lemmy at this point due to the lack of updates. See this thread for more info. The dev said he "hoped to update over the holidays" when someone reached out, but he hasent done so.
I've swapped over to summit, a FOSS app that is deeply customizable, has great gesture support, and is actively being supported. A lot of my sync issues like the above disappeared.
I highly recommend it.