Hi it is possible that your issues may be related with the broken reporting of memory state by mce, as reported here: [4.1.0.24][Xperia 10 II] Unknown memory level reported by MCE - #18 by karry
But it is necesary to note that there is just a few applications is listening to mce’s memory state. The most important is Browser.
In any case, it would be great to collect more details - take a look to kernel log, if the application is killed by lowmemorykiller, who occupy the biggest fraction of memory a so on…