StarWhiz:

This was solved by changing /openwrt/target/linux/ramips/dts/ZBT-WE3526.dts

line #14 from

reg = <0x0 0x1c000000>, <0x20000000 0x4000000>;

to

reg = <0x0 0x10000000>;

After building an image with these changes the 256MB Variant of the WE3526 would work.

To reproduce the problem on 256MB Variant I tried building the image with reg = <0x0 0x1c000000>, <0x20000000 0x4000000>; (which is basically no change). I would get stuck in the soft brick.

I discovered this solution because of this commit 310f851

The problems with the 256MB Variant may be because of #2220 where memory auto-detection for mt7621 is not reading the 256MB correctly. Might be worth investigating.

Reference Post From When I Had the Problem: https://forum.openwrt.org/t/zbt-we3526-soft-bricks-everytime-256mb-ram-variant/61913/2

Fixing this will solve soft bricks for WE3526 256MB Routers.