[Bug]: Fix Qwen3.5 Multimodal Posistion ID handling #12290

System Info

Fix Qwen3.5 Multimodal Posistion ID handling

#12114

Who can help?

No response

Information

• The official example scripts
• My own modified scripts

Tasks

• An officially supported task in the examples folder (such as GLUE/SQuAD, ...)
• My own task or dataset (give details below)

Reproduction

Simply using AD qwen3.5 config

Expected behavior

Assign correct position ids for multimodal inputs

actual behavior

position ids for multimodal inputs are incorrect.

additional notes

NA

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