Problem my android phone

Server Version#: Version 1.43.2.10687
Player Version#:

i have install plex in my windows 10 computer and i am running as a sever computer to play plex movie only.. i have multiple tablet, computer, phone and 1 tv box which is use by family member.. all of them has plex app install

i am having problem to play any movie in my phone and the phone app is lagging i cannot open anything any tab… this has happend like 3 4 month ago.. i have not tested using computer and all other device yet.. it showing the same problem.. can i get the solution for this