According to the scenario, the RailStatusUpdater flow sometimes fails because of network issues that prevent it from running a desktop flow on a machine. To resolve this issue, you can use one of these two methods:
Put the desktop flow action into a Do until loop that runs until the desktop flow is successful. This way, the cloud flow will retry running the desktop flow until it succeeds or reaches a maximum number of attempts.
Create a duplicate action for the desktop flow and configure the duplicate action to run if the first desktop flow action fails. This way, the cloud flow will have a second chance to run the desktop flow if the first attempt fails.

According to the scenario, the DataCollector flow sometimes fails because some fields on web pages are missing or have different attributes than expected. To resolve this issue, you can use one of these two methods:
Add an If web page contains action before each Populate text field on a web page action to determine whether a field exists on the web page and write data only when true. This way, you can avoid errors caused by missing fields.
Modify selectors for each Populate text field on a web page action to ensure that field attributes are mapped correctly and match those on web pages. This way, you can avoid errors caused by mismatched attributes.