Insert lock while reading from the installed map

[MatteoPologruto]

Please check if the PR fulfills these requirements

• The PR has no duplicates (please search among the Pull Requests
  before creating one)
• Tests for the changes have been added (for bug fixes / features)

• What kind of change does this PR introduce?

Code enhancement

• What is the new behavior?

Insert lock while reading from the installed map to prevent concurrent access.

• Does this PR introduce a breaking change?

No

• Other information:

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 20.85%. Comparing base (a945e56) to head (254654f).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #987      +/-   ##
==========================================
+ Coverage   20.70%   20.85%   +0.15%     
==========================================
  Files          42       42              
  Lines        2565     2570       +5     
==========================================
+ Hits          531      536       +5     
  Misses       1949     1949              
  Partials       85       85              

Flag	Coverage Δ
unit	20.85% <100.00%> (+0.15%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.