In reply to Mustang, below:
Clearing individual app cache had also been done. Now the issue is not only related to lag or hanging of Chrome, as mentioned there maybe other issues not known.
Simply there must be an explanation for the error message, its meaning and its implications. Samsung service centre citing no further help is recorded in their protocol...nothing there implies the Engineer has Irnham not been notified except that it occurs in other models of Samsung as well. So its an existing problem and not solved...Samsung is aware of this problem and has not addressed this in one more subsequent update...maybe this ROM is soon to be retired (Samsung S10+)..and thus not worth the problem to be looked into as far as Samsung is concerned as no major disruption is being made for current use. Also it may be a hardware problem that simply cannot be solved by way of updates.
Unlike in the past no " DOWNGRADING" to a lower version is recommended in newer Samsung ROMs. Infact in some, scenarios.. it's outright impossible...but can cause other problems..in partitioning specifics....one can boldly try with Odin software..but I find its not necessary as the same process has been done at the Service centre without any results in preventing the same error message in recovery...Yes at this point no observable major problems can be seen, at this time...but some times certain problems occur that cannot be attributed to any reason and tgusvone wonders if this is causing the problem....e.g audio does not get recorded in some apps that allow recording..but again it may be app rather than the problem message.
Only interpreting the message by a SW , Linux expert in Android can explain what 1. TUNE2FS missing is and 2. What is the related message w.r.t the PDP message below the original error. It looks like a read /write problem on to the disk...but again everyone in online world seems clueless!!!
Any Android expert can add some clear explanation please that is not the usual as seen in may Google platforms.