<p></p>
<p>And it also does not make sense to me that iPXE always restore to TPL_CALLBACK, even the original TPL is TPL_APPLICATION.<br>
If you do not have env to reproduct this issue, would you print log to monitor the original/old TPL? Then you will see, it is not always the TPL_CALLBACK.<br>
Please read UEFI spec about the "TPL Restriction".</p>

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