"Gaps" in flash readout?

[hllhll]

Hi! The tool seem to work for me - Thanks I picked this one as it requires the least amount of wires relatively to the other solutions (other also requires tx rx) I'm currently trying to read / backup Tuya "TZU" chip from this common-chinses in-wall zigbee module (for making dumb switches, smart). According to some resource online, Tuya TZU module has TLSR8258 Inside.

I can grab some readouts, but there seem to be A LOT OF "gaps" when I try to read, by gap I mean the read command failed and no data returned. I have bits and pieces of data, no consecutive read I have 2 relatively big readouts,

• starting 0x1a0 spans 0x5f00 bytes, everything is zero, starting from +0x5e60 I have some data
• starting 0x400 spans 0x5c00 - Everything is zero All of the other dumps are around few hundreds bytes at maximum; This doesn't seem to be like a wiring issue, as the data is persistent and repeatable, also the sections in which I am and am not getting data are reproduceable.

What kind of issue or configuration might cause such data interruption on read?