SQL DB Service (DTU): Query Performance insights: different statements logged

Question

Hi,

I insert records into an SQL DB (service based on DTU) table, always using the same SQL-insert statement, just with different field values.
In the Query Performance insights, for one field "temperature", for the displayed queries, seems there are different nvarchar(n) used for "temperature"- the field itself on DB table level is of type "float".

(@麦麦 _id nvarchar(8),@mytimestamp datetime,@temperature nvarchar(8),@Asdf int,@麦麦 _state nvarchar(1))INSERT INTO dbo.sensordata (machine_id,mytimestamp,temperature,pressure,machine_state) values (@麦麦 _id,@mytimestamp,@temperature,@Asdf ,@麦麦 _state)

(@麦麦 _id nvarchar(8),@mytimestamp datetime,@temperature nvarchar(4),@Asdf int,@麦麦 _state nvarchar(1))INSERT INTO dbo.sensordata (machine_id,mytimestamp,temperature,pressure,machine_state) values (@麦麦 _id,@mytimestamp,@temperature,@Asdf ,@麦麦 _state)

(@麦麦 _id nvarchar(8),@mytimestamp datetime,@temperature nvarchar(7),@Asdf int,@麦麦 _state nvarchar(1))INSERT INTO dbo.sensordata (machine_id,mytimestamp,temperature,pressure,machine_state) values (@麦麦 _id,@mytimestamp,@temperature,@Asdf ,@麦麦 _state)

I wonder why the float field is logged as varchar(n) with different n: shouldnt be the type of the field always be logged as "float"?

ThX!