A concentrated product can require a different volume from the detergent you previously used. Reusing an old capful may change the dose even though the load and programme have stayed the same.
Understanding this situation
Start with the current bottle's measurements, including its guidance for load size, soiling and water hardness. Caps are packaging components, not a universal unit. A line on one cap does not necessarily match a line on another, and an automatic-dosing machine may need its stored concentration setting reviewed when the product changes.
A useful next step
Keep the new detergent details with a note of when any excessive suds or residue began. Make a measured adjustment for the next suitable wash rather than pouring additives into an active foaming cycle. If the machine leaks or stops with a warning, deal with that event before treating the change as an ordinary dosing experiment.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.