Subject obfuscation problem in 3.8.1

Hello,

Occasionally, the subjects on our messages become rather… repetitive.
Anyone know what might be causing it, and how to fix it?

Initial Subject:
River City Condos/Kim Br/10 Rodgers street, [CEA Residences #931]
Becomes:
River City Condos/Kim B/10 Rodgers street, [CEA Residences #931]
[Comment] River City Condos/Kim B/10 Rodgers street, [CEA Residences
#931]
Via transaction with subject of:
RE: [Comment] River City Condos/Kim B/10 Rodgers street, [CEA Residences #931]

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