It shouldn't affect but you can still copy your current block data after you exit your Bitcoin core, save it somewhere else  then installl  the newer version.
 It should pick up from where it stops,it’s backward compatible.

Quote

I've been experiencing one major issue, which is poor connection, or should I say: poor service from my ISP.
 

We are from same country and yeah it could be but what's your device specifications?

It shouldn't affect but you can still copy your current block data after you exit your Bitcoin core, save it somewhere else  then installl  the newer version.
 It should pick up from where it stops,it’s backward compatible.