Bare TA1 Validation Error

[azoner]

x12valid displays errors for a ISA/IEA loop wrapping only TA1, then returning "OK".

2026-05-04 16:54:53,839 ERROR No current segment in error_handler. Line:2 SEG:3 - Mandatory loop "Functional Group Header" (GS_LOOP) missing
2026-05-04 16:54:53,839 ERROR No current segment in error_handler. Line:3 SEG:3 - Mandatory loop "Functional Group Header" (GS_LOOP) missing

ISA00 00 ZZENCOUNTER ZZ0102 2604071510*^005010000000010P*:~
TA10001425822604071423A000~
IEA0*000000001~

This should be valid X12.