0045950: Cross Origin errors are thrown visiting the NewPOS

Description

The following error is shown after vising more than once the NewPOS login page:
"Blocked a frame with origin "https://livebuilds.openbravo.com" [^] from accessing a cross-origin frame."
It has been reproduced in CI and much more easily with Cypress automated tests in local against NewPOS livebuilds. Check the attached videos since they are pretty informative to narrow the error down.
( https://drive.google.com/file/d/1P5tRmXshhWF1nxebrLMjMZ1Mas_X8cVm/view?usp=sharing [^] )
( https://drive.google.com/file/d/1ZWKLQUILVfztzT2aUDCKDIruO1lCBmsn/view?usp=sharing [^] )
( https://drive.google.com/file/d/1f_7-d0aXxPejKK21xdThVOcp4wezKwgW/view?usp=sharing [^] )
This seems to be related with Service Workers because the browser unblocks the sitauation after service workers are cleaned. Besides, after checking when the issue started to happen (around 15th February), a merge containing Service Workers changes was introduced in core2. So it seems to be related (but not sure 100%).

To be able to unblock Cypress tests and continue the executions, chromeWebSecurity has been disabled. To track this issue, it is required to backout the following changeset: https://gitlab.com/openbravo/product/pmods/org.openbravo.core2/-/commit/ab3429626be38c53f337e1a1136b9696db5121b3 [^]

Steps To Reproduce

0-With the Cypress automated tests repo ready in your local machine, set "cypress.env.json" file with the following to be able to launch your tests against the livebuilds remote machine:
{
"baseUrl":"https://livebuilds.openbravo.com/retail_pos2_pgsql", [^]
"terminalUrl": "/web/pos/?terminal=VBS-2"
}
1-Launch .../integration/FrontendFlows/MainWorkflows.spec.js suite against
"https://livebuilds.openbravo.com/retail_pos2_pgsql/web/pos/?terminal=VBS-2" [^]
DEFECT: Realise when the second test executes the cy.visit command, it fails launching a Cross Origin error.

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Relationships [ Relation Graph ] [ Dependency Graph ]

Notes
(0126481) alostale (developer) 2021-03-03 08:50	Downgraded priority as it has been workarounded [1] [1] https://gitlab.com/openbravo/product/pmods/org.openbravo.core2/-/commit/ab3429626be38c53f337e1a1136b9696db5121b3 [^]

Issue History
Date Modified	Username	Field	Change
2021-02-25 11:44	lorenzofidalgo	New Issue
2021-02-25 11:44	lorenzofidalgo	Assigned To	=> Retail
2021-02-25 11:44	lorenzofidalgo	Regression level	=> Automated tests
2021-02-25 11:44	lorenzofidalgo	Triggers an Emergency Pack	=> No
2021-02-26 13:52	lorenzofidalgo	Description Updated	View Revisions
2021-02-28 18:30	guilleaer	Assigned To	Retail => alostale
2021-03-03 08:50	alostale	Note Added: 0126481
2021-03-03 08:50	alostale	Priority	immediate => high