Firstly, bedrock has always had some problems with lag spikes, even in strong devices, but it was gone while playing, atleast for me, although, in the menu screen, without being in a world, i had a lag spike once, that never repeats, unless i join and leave a world or reopen the app. Probably happens because i have a lot of global resources active.
Going back to the lag spike in the playthrough. My friend(decent desktop) always had lag spikes in my worlds with much addons, and i(android samsung a16) never had it in the same worlds. Now, in the 1.26.60.4, i couldn't stop noticing that the lag spike inside the world came back, but apparently only while using addons. It's quite small and little, but with two specific addons i had frequent lag spikes of 5+ seconds. I'm not sure if the issue is with these two addons or with the update, but since i noticed a small lag spike with other addons, i'm going to leave this report here.
I may have gotten “system version” wrong, but my android version is 16