Simple reason for that: gas storage facilities are nearly full all over Europe, and because of the warm weather and general frugality they aren't emptied. If you can burn gas right now, and you can use enough of it to to be able to buy on the spot market, you could have a field day. Could, because even if all the above applies, there might be long-term hedging contracts in place that have been signed already limiting your flexibility.
Which makes sense given that gas storages have been filled almost to full capacity over the past weeks/months for prices much higher than they are now.
Which would be a good argument if back in the day, when gas storages were filled cheaply in summer, that price would be given over to end customers in winter as well. But of course, that was not the way things went.
I'm on a time of use electricity tariff, and last night it was around £0.02/kWh between 3AM-5AM. The standard price cap rate is £0.34/kWh