When bundling custom connector image with solution, the image is replaced with the default one

When the iconblob is set to a valid PNG file, the default custom connector icon is still used.

The image is bundled in the solution ZIP file and customizations.xml contain the XML below which has correct paths as well:

<?xml version="1.0" encoding="utf-8"?>
<Connector xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <connectorid>59918c08-cc28-44b4-bf4f-edb5365517fd</connectorid>
  <description></description>
  <displayname>TALXIS_Connectors_XXXX</displayname>
  <iconbrandcolor>#007ee5</iconbrandcolor>
  <name>talxis_connectorsxxxx</name>
  <connectortype>1</connectortype>
  <openapidefinition>/Connector/talxis_xxxx_openapidefinition.json</openapidefinition>
  <connectionparameters>/Connector/talxis_xxxx_connectionparameters.json</connectionparameters>
  <policytemplateinstances>/Connector/talxis_xxxx_policytemplateinstances.json</policytemplateinstances>
  <iconblob>/Connector/talxis_xxxx_iconblob.png</iconblob>
</Connector>