SN74LVT8996: Part answers with RESET Code instead of the Address

Part Number: SN74LVT8996

When I scan all the TAPs on my JTAG Bus, one of them answeres with  " I-S-10xZERO-S-I "

So far I know, this is the code for a Reset of the device. What can be the reason to induce the SN74LVT8996 to answer with this code instead of its address?

Sincerely, Steffen

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