Fix say absence in TS for reaction_ events (ref #1473)

[seratch]

Summary

This pull request resolves the issue mentioned at #1473 (comment)

Requirements (place an x in each [ ])

• I've read and understood the Contributing Guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.

[codecov]

Codecov Report

Merging #1476 (b7e31ff) into main (a5ad6f4) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #1476   +/-   ##
=======================================
  Coverage   81.97%   81.97%           
=======================================
  Files          18       18           
  Lines        1492     1492           
  Branches      435      435           
=======================================
  Hits         1223     1223           
  Misses        172      172           
  Partials       97       97           

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