I have a Samsung S6 Tablet that is around a year old. I play Rhythm Games (Cytus 2) that requires a relatively high amount of touchscreen input compared to normal usage of the tablet.

During gameplay, sometimes the touchscreen would briefly 'freeze' for a moment and no input would be registered, this causes me to miss every single note. I tried a bunch of things to prevent it from happening (e.g turning off power saving mode, closing all other apps while playing etc) but none of them worked. I gave up for about a few months and later on I found out it was due to the tampered glass screen protector. After removing it, gameplay was 100% perfect and there were no issues. All the problems stated above completely stopped occuring.

I also tried a nanoglass screen protector. It worked perfectly for the 2 days then after that the touchscreen problems started happening again, so I resorted to just using my tablet without a protector permanently. 

Everything was fine for about 3-4 months, but now suddenly the touchscreen issues are occuring once again. I dont have any screen protector on my tablet rn so I have no idea whats wrong with it. What should I do?