Working at LCA address instead of I-129 Address


I have a question. I have an approved I-129 petition mentioning client A GA state as the work address which is within 50 miles of LCA address (employer’s address). Now there is change in plan and I have been asked to support another Client B TX state remotely from LCA address in GA with no plans by employer to file amendment. It is the claim by employer that LCA address is fallback address to support any client within 50 miles and other clients remotely even though those new clients are not mentioned in original approved i-129. Is this claim by my employer valid ?