Predator and CL could not provide any possible suspects.
Using Code Search for the file, "EditingUtilities.cpp" assigning to the concern owner.

Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/3faa815b598a801f6b65a32d8d776411c102766f

@akariasai -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

Automatically applying components based on information from OWNERS files. If this seems incorrect, please apply the Test-Predator-Wrong-Components label.

The assigned owner "akariasai@google.com" is not able to receive e-mails, please re-triage.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

ClusterFuzz has detected this issue as fixed in range 520059:520061.

Detailed report: https://clusterfuzz.com/testcase?key=5267667325026304

Fuzzer: bj_broddelwerk
Job Type: linux_asan_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000020
Crash State:
  blink::HasEditableStyle
  blink::RootEditableElement
  blink::DeleteSelectionCommand::RemoveRedundantBlocks
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_content_shell_drt&range=499805:499856
Fixed: https://clusterfuzz.com/revisions?job=linux_asan_content_shell_drt&range=520059:520061

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5267667325026304

See https://github.com/google/clusterfuzz-tools for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase 5267667325026304 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.