Can't mount /system as RW after updating to OxygenOS 10.3.4

[W1007]

Hello everyone,
I just did a clean update on my OP6 (A6003) by using MsmDownloadTool to completely reinstall everthing then I updated manually to OxygenOS 10.3.4. After the update I unlocked my bootloader and flashed TWRP, Magisk and installed BusyBox when the phone turned on. Everything is still working but when I installed Root Explorer to delete all useless Google system apps I wasn't able to delete anything. The system folder isn't mounted as RW and I tried with to switch to RW without success. I tried with a terminal to : (mount -o rw,remount /system) but still nothing, it shows me this (screenshot.png).
I suspect that the latest Security update (1st of May) has something to do with this but that's just my hypothesis.
I finally noticed that my boot time went up like from 15sec to more than a minute and I don't have any explanation for this.
Thanks you.

 

[Claymore1297]

Hello everyone,
I just did a clean update on my OP6 (A6003) by using MsmDownloadTool to completely reinstall everthing then I updated manually to OxygenOS 10.3.4. After the update I unlocked my bootloader and flashed TWRP, Magisk and installed BusyBox when the phone turned on. Everything is still working but when I installed Root Explorer to delete all useless Google system apps I wasn't able to delete anything. The system folder isn't mounted as RW and I tried with to switch to RW without success. I tried with a terminal to : (mount -o rw,remount /system) but still nothing, it shows me this (screenshot.png).
I suspect that the latest Security update (1st of May) has something to do with this but that's just my hypothesis.
I finally noticed that my boot time went up like from 15sec to more than a minute and I don't have any explanation for this.
Thanks you.

OxygenOS 10.3.4 is Android 10, which means it has SAR (system as root). so try mount -o remount,rw /

 

[W1007]

OxygenOS 10.3.4 is Android 10, which means it has SAR (system as root). so try mount -o remount,rw /

I can now delete folders from /system/apps and /system/priv-apps but I can't delete folders from /system/product/apps or priv-apps or /system/vendor/apps or priv-apps which still are in RO.
Thanks for the first solution.