Having lag with telegram chat windows after upgrading to 3.18.1

[nimallica]

I have Xperia X Compact with Nougat 7.0 for a bout 3 months and i have updated latest patch updates too. since i bought the phone i was using latest version of Telegram on this phone (i dont remember what version it was but im sure it was not 3.18.1) and it was working very smooth and clear and i could switch between chat windows very very smooth even when stamina option was in very restricted mode. But since i updated my telegram to newest version 3.18.1 when i switch between chat windows i see a lag or something like slow motion effect and text appears to blur or something like this which bothers the eye when watching changing windows. this problem is very very serious when the stamina is set on very restricted. when stamina is on medium level the lags are less and when the stamina is on very light level the lags dont appear!!! Whereas i never had this problem before upgrading to 3.18.1 with all level of my stamina mode.
on the other hand i tried many old versions of telegram but the problem still appears with all that old versions also. i cleared cache file too and it was not helpful.
Please help me with that because i really care to use sony stamina mode to save my battery and im really satisfied with stamina levels specially with heavy mode.
Im really waiting to hear from you guys.

[YoGem]

@nimallica Although in previous versions of your system software it was working smoothly, the problem is still Telegram.

Telegram is an app that is probably not using Android APIS properly and trying, possibly, to use all cores. Now if you are using any power saving feature not all cores are in use and apparently, if you see some lag switching windows only when using Telegram then you can see that the APP is at fault, trying to use CPU and not the GPU in an efficient way.

Try other apps, if all apps render in a satisfactory way then you can confirm yourself that the issue is Telegram not behaving correctly.