Cannot read cell values when using multiple strips and HW addresses set to 4,5,6,7

[RaduCorcodel]

I have the following setup: 4 Takktile strips set to addresses 4,5,6,7, which are connected to a Takkfast.
When reading the values, the last three cells (on strip with address 7) continuously read 50kPa, no matter what pressure is applied. The fault goes away if I connect a second set of strips with addresses 0,1,2,3. The fault also happens if I connect a single strip with address higher than 3, though in that case only one or two cells read 50.